Floor duct flush with screed with foil/sealing option steel BKFD 400x(65-110)mm. Screed-flush installation duct according to DIN EN 50085-1 and DIN EN 50085-2-2, with sealing option for blind covers and covers, with flexible foil formwork, consisting of: channel side profiles made of aluminum, crossbeams, screed anchors, floor covering application profiles (0 or 4 mm) made of plastic, leveling clamps with channel connectors and leveling pins, screwed blind covers, suitable for dry-maintained floors, acoustically decoupled, pre-assembled at the factory, sealing tape included.